Abstract
We report on a systematic excitation-density-dependent all-optical femtosecond time-resolved study of the spin density wave state in iron-based superconductors. The destruction and recovery dynamics are measured by means of the standard and a multipulse pump-probe technique. The experimental data are analyzed and interpreted in the framework of an extended three-temperature model. The analysis suggests that the optical-phonon energy relaxation plays an important role in the recovery of almost exclusively electronically driven spin density wave order.
8 More- Received 16 April 2018
- Revised 13 July 2018
DOI:https://doi.org/10.1103/PhysRevB.98.035148
©2018 American Physical Society